PL434810A1 - Catalyst for selective reduction of NOx, in particular with ammonia, in the tail gases of the nitric acid plant, and method for its production - Google Patents
Catalyst for selective reduction of NOx, in particular with ammonia, in the tail gases of the nitric acid plant, and method for its productionInfo
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- PL434810A1 PL434810A1 PL434810A PL43481020A PL434810A1 PL 434810 A1 PL434810 A1 PL 434810A1 PL 434810 A PL434810 A PL 434810A PL 43481020 A PL43481020 A PL 43481020A PL 434810 A1 PL434810 A1 PL 434810A1
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- nox
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Abstract
Przedmiotem zgłoszenia jest katalizator, który charakteryzuje się tym, że prekursor nośnika katalizatora jest złożonym hydroksytlenkiem żelazowo-glinowym, w którym stosunek molowy Fe/Al mieści się w zakresie od 1,5 do 3,0, korzystnie od 1,6 do 2,0, a finalny katalizator zawiera tlenek wanadu V2O5, którego stężenie mieści się w zakresie 1 — 10% wag. i ewentualnie tlenek lantanu La2O3 o stężeniu w zakresie od 0,1 do 5% wag., korzystnie w zakresie od 1 do 3% wag. Przedmiotem zgłoszenia jest także sposób otrzymywania katalizatora wg wynalazku, który charakteryzuje się tym, że z roztworu zawierającego co najmniej jeden glinian i co najmniej jedną rozpuszczalną w wodzie sól żelaza(II) wytrąca się złożony hydroksytlenek żelazowo - glinowy stanowiący prekursor nośnika, który poddaje się kolejno starzeniu w roztworze macierzystym, filtracji, odmywaniu wodnej zawiesiny prekursora, suszeniu, formowaniu w kształtki i kalcynacji kształtek, po czym uzyskany nośnik tlenkowy ewentualnie impregnuje się wodnym roztworem azotanu lantanu, suszy, kalcynuje a następnie impregnuje wodnym roztworem metawanadanu amonu, suszy, kalcynuje i ewentualnie powtarza się operacje impregnacji, suszenia i kalcynacji w wyniku czego uzyskuje się katalizator.The subject of the application is a catalyst characterized in that the catalyst support precursor is a complex ferro-aluminum hydroxide in which the Fe / Al molar ratio is in the range from 1.5 to 3.0, preferably from 1.6 to 2.0 and the final catalyst contains vanadium oxide V2O5, the concentration of which is in the range 1-10 wt%. and optionally La2O3 lanthanum oxide with a concentration ranging from 0.1 to 5 wt.%, preferably in the range of 1 to 3 wt.%. The subject of the application is also the method for the preparation of the catalyst according to the invention, which is characterized in that a complex iron-aluminum hydroxide precursor is precipitated from a solution containing at least one aluminate and at least one water-soluble iron (II) salt. aging in the mother liquor, filtration, washing off the aqueous suspension of the precursor, drying, forming into shapes and calcining the shapes, and then the obtained oxide carrier is optionally impregnated with an aqueous solution of lanthanum nitrate, dried, calcined and then impregnated with an aqueous solution of ammonium metavanadate, dried, calcined and optionally the impregnation, drying and calcination operations are repeated to obtain a catalyst.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| PL434810A PL244075B1 (en) | 2020-07-27 | 2020-07-27 | Catalyst for selective reduction of NOx, in particular with ammonia, in the tail gases of the nitric acid plant, and method for its production |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| PL434810A PL244075B1 (en) | 2020-07-27 | 2020-07-27 | Catalyst for selective reduction of NOx, in particular with ammonia, in the tail gases of the nitric acid plant, and method for its production |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| PL434810A1 true PL434810A1 (en) | 2022-01-31 |
| PL244075B1 PL244075B1 (en) | 2023-11-27 |
Family
ID=80111571
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| PL434810A PL244075B1 (en) | 2020-07-27 | 2020-07-27 | Catalyst for selective reduction of NOx, in particular with ammonia, in the tail gases of the nitric acid plant, and method for its production |
Country Status (1)
| Country | Link |
|---|---|
| PL (1) | PL244075B1 (en) |
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2020
- 2020-07-27 PL PL434810A patent/PL244075B1/en unknown
Also Published As
| Publication number | Publication date |
|---|---|
| PL244075B1 (en) | 2023-11-27 |
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